Christie McHugh's five-year-old son and six-month-old daughter were with her when she died, following an apparent road rage incident.
She is believed to have suffered fatal head injuries after falling off the bonnet of a car.
A witness has described her lying in the road bleeding from a head wound.
Flowers have been left at the scene where she died.
More top news
Prince Harry's Invictus Games is hailed a success as it closes with star performances from the Kaiser Chiefs, Ellie Goulding and Diversity.
Levi Roots from Brixton is the UK's richest reality star and Leone Lewis also makes the Top 10, but how did other Londoners fare?
The mayor is expected to be joined by his wife when he asks local Conservatives to choose him as their candidate in the general election.